On a red vertical rectangle arced convexly at the top and bottom and edged with a 1/8 inch (.32 cm) white border, a stylized Native American chief head with war bonnet in profile to the right in red, detailed and fimbriated white. Attached above the rectangle, two concentric red scrolls, edged with a 1/8 inch (.32 cm) white border, inscribed FULLERTON and UNION HIGH SCHOOL in white. Attached below the rectangle, a red scroll edged with a 1/8 inch (.32 cm) white border, inscribed INDIAN BATTALION in white. Overall dimensions are 31/2 inches (8.89 cm) in height by 2 5/8 inches (6.67 cm) in width.

Red and white are the school colors. Fullerton Union High School was established in 1893, and was one of the oldest high schools on the West Coast. The colors and mascot were copied from Stanford University at the time. Stanford University was founded in 1891 and their mascot was the Indian and their colors are cardinal red and white. Two years later, in 1893, Fullerton High School was established and, like Stanford, chose the Indian as their mascot. At that time, the American Indian represented the freedom and opportunity offered by the American west of the 19th century. At Fullerton High, the Indian remains a symbol for freedom. The JROTC Indian Battalion motto is Faith and Courage. Faith represents belief in ourselves, school, state and country. Courage gives us the ability to act, and take action on our beliefs.

On a shield shaped gold metal and epoxied device 1 3/16 inches (3.02 cm) in height blazoned as follows: Argent, a silhouette of a Native American chief with war bonnet Gules, edged and detailed Or, all within a border Azure. Attached below the shield, a blue scroll with the inscription FAITH AND COURAGE in gold letters.

Red and white are the school colors. Fullerton Union High School was established in 1893, and was one of the oldest high schools on the West Coast. The colors and mascot were copied from Stanford University at the time. Stanford University was founded in 1891 and their mascot was the Indian and their colors are cardinal red and white. Two years later, in 1893, Fullerton High School was established and, like Stanford, chose the Indian as their mascot. At that time, the American Indian represented the freedom and opportunity offered by the American west of the 19th century. At Fullerton High, the Indian remains a symbol for freedom. The JROTC Indian Battalion motto is Faith and Courage. Faith represents belief in ourselves, school, state and country. Courage gives us the ability to act, and take action on our beliefs.

The shoulder loop insignia was authorized 28 February 2019.